Prior to the 1950's, isolation of sufferers of Hansen's disease (also known as leprosy) was considered essential for the protection of the general population. To manage this in Queensland, leper colonies (or lazarets) were established on Stradbroke Island (Dunwich), Friday Island, Peel Island and Fantome Island in the late 1800's and early 1900's. These lazarets were racially segregated, usually catering to either exclusively white or exclusively "non-white" patients. Peel Island Lazaret was an exception to this rule, providing for all lazaret patients between 1907 and 1940, although strict segregation on the island was still observed, with living conditions favouring white inhabitants.
The registers in this series document patient information captured at these lazarets, including personal particulars, medical history and location information (admissions, transfers etc.).
Several of the registers record personal particulars such as name, age, sex, nationality, parent's details and other biographical information. Also often recorded are dates of admission/arrival, dates and locations of death, burial and grave information, discharge dates and transfer information. Some of the registers record medical treatment and test results during the patient's period of residence.